Difference between revisions of "CT of sinusitis"
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File:CT of the ostiomeatal complex, coronal plane, with annotations.png|Ostiomeatal complex (green area) | File:CT of the ostiomeatal complex, coronal plane, with annotations.png|Ostiomeatal complex (green area) | ||
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| + | :If detected, measure the attenuation of the mucus. Acute sinus secretions have a radiodensity of 10 to 25 [[Hounsfield unit]]s, but in a more chronic state they become more viscous, with a radiodensity of 30 to 60 HU.<ref>[https://books.google.com/books?id=FxUgUBVBmUUC&pg=PA674 Page 674] {{webarchive|url=https://web.archive.org/web/20170216044325/https://books.google.com/books?id=FxUgUBVBmUUC&pg=PA674 |date=2017-02-16 }} in: {{cite book|title=Cummings Otolaryngology – Head and Neck Surgery: Head and Neck Surgery, 3-Volume Set|author=Paul W. Flint, Bruce H. Haughey, [[John Niparko|John K. Niparko]], Mark A. Richardson, Valerie J. Lund, K. Thomas Robbins, Marci M. Lesperance, J. Regan Thomas|publisher=Elsevier Health Sciences|year=2010|isbn=9780323080873}}</ref> | ||
*Any sclerotic thickening of the walls of the sinuses, indicating chronic sinusitis. | *Any sclerotic thickening of the walls of the sinuses, indicating chronic sinusitis. | ||
*Any abnormal protrusion of teeth into the maxillary sinuses.<ref name="ScheinfeldShifteh2012">{{cite journal|last1=Scheinfeld|first1=Meir H.|last2=Shifteh|first2=Keivan|last3=Avery|first3=Laura L.|last4=Dym|first4=Harry|last5=Dym|first5=R. Joshua|title=Teeth: What Radiologists Should Know|journal=RadioGraphics|volume=32|issue=7|year=2012|pages=1927–1944|issn=0271-5333|doi=10.1148/rg.327125717}}</ref> | *Any abnormal protrusion of teeth into the maxillary sinuses.<ref name="ScheinfeldShifteh2012">{{cite journal|last1=Scheinfeld|first1=Meir H.|last2=Shifteh|first2=Keivan|last3=Avery|first3=Laura L.|last4=Dym|first4=Harry|last5=Dym|first5=R. Joshua|title=Teeth: What Radiologists Should Know|journal=RadioGraphics|volume=32|issue=7|year=2012|pages=1927–1944|issn=0271-5333|doi=10.1148/rg.327125717}}</ref> | ||
Revision as of 20:21, 12 April 2019
Author:
Mikael Häggström [notes 1]
Planning
Settings
- A low-dose CT without contrast is generally sufficient in suspected acute sinusitis.
- Normal radiation dose is indicated in suspected chronic sinusitis.
- Imaging without and with IV contrast is indicated in a suspected facio-maxillary abscess.
Evaluation
- Mucus content in paranasal sinuses, particularly the ostiomeatal complex.
Ostiomeatal complex (green area)
- If detected, measure the attenuation of the mucus. Acute sinus secretions have a radiodensity of 10 to 25 Hounsfield units, but in a more chronic state they become more viscous, with a radiodensity of 30 to 60 HU.[1]
- Any sclerotic thickening of the walls of the sinuses, indicating chronic sinusitis.
- Any abnormal protrusion of teeth into the maxillary sinuses.[2]
- Any mucus or fluid in the outer or middle ear.
Notes
- ↑ For a full list of contributors, see article history. Creators of images are attributed at the image description pages, seen by clicking on the images. See Radlines:Authorship for details.
References
- ↑ Page 674 in: Paul W. Flint, Bruce H. Haughey, John K. Niparko, Mark A. Richardson, Valerie J. Lund, K. Thomas Robbins, Marci M. Lesperance, J. Regan Thomas (2010). Cummings Otolaryngology – Head and Neck Surgery: Head and Neck Surgery, 3-Volume Set . Elsevier Health Sciences. ISBN 9780323080873.
- ↑ Scheinfeld, Meir H.; Shifteh, Keivan; Avery, Laura L.; Dym, Harry; Dym, R. Joshua (2012). "Teeth: What Radiologists Should Know ". RadioGraphics 32 (7): 1927–1944. doi:. ISSN 0271-5333.
